There's something about Brink, I gladly play it for quite a bit for free for some reason. It's like it's halfway to good in enough areas. When you do get a game that works with people playing roles and using the maps, you can see how they intended it to be. When you find those spots to bound over and around the map and come up behind everyone that's just great. And the medic works alright, I like playing medic in games.
They should hunker down for a few months, make gobs of cosmetic items plus a few more maps and as Green Man said, go F2P. Actually, take six months, you need to add females for it to really take off.